c# - System.Collections.IDictionaryEnumerator 优于 System.Collections.IEnumerator 的优点

Question

我对这个问题很困惑。

Which of the following advantages does System.Collections.IDictionaryEnumerator provide over System.Collections.IEnumerator?

a: It adds properties for direct access to both the Key and the Value
b: It is optimized to handle the structure of a Dictionary.
c: It provides properties to determine if the Dictionary is enumerated in Key or Value order
d: It provides reverse lookup methods to distinguish a Key from a specific Value

Answer 1

一个:是的

b: 枚举器不处理集合，它只是枚举它们

c: 字典未排序(内部排序但不在键上)

d: 绝对不会

重要的一点是它用于非通用词典。